package com.djl.server.config.security;

import org.apache.catalina.connector.Request;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
import org.springframework.security.core.context.SecurityContext;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.web.authentication.WebAuthenticationDetailsSource;
import org.springframework.web.filter.OncePerRequestFilter;

import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

/**
 * @program: yebweb
 * @description: jwt登录授权过滤器
 * @author: Mr.dai
 * @create: 2021-08-06 16:19
 **/

public class JwtAuthencationTokenFilter extends OncePerRequestFilter {

    @Value("${jwt.tokenHeader}")
    private String tokenHeader;
    @Value("${jwt.tokenHead}")
    private String tokenHead;
    @Autowired
    private JwtTokenUtil jwtTokenUtil;
    @Autowired
    private UserDetailsService userDetailsService;

    @Override
    protected void doFilterInternal(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, FilterChain filterChain) throws ServletException, IOException {
        String authHeader = httpServletRequest.getHeader(tokenHeader);
        //头部不存在或者不是以head开头
        if (null!=authHeader && authHeader.startsWith(tokenHead)){
            String authToken = authHeader.substring(tokenHead.length());
            String username = jwtTokenUtil.getUserNameFromToken(authToken);
            //token存在用户名但是未登录
            if(null!=username && null== SecurityContextHolder.getContext().getAuthentication()){
                //登录
                UserDetails userDetails = userDetailsService.loadUserByUsername(username);
                //验证token是否有效，重新设置用户对象
                if (jwtTokenUtil.validateToken(authToken,userDetails)){
                    UsernamePasswordAuthenticationToken authenticationToken=new UsernamePasswordAuthenticationToken
                            (userDetails,null,userDetails.getAuthorities());
                    authenticationToken.setDetails(new WebAuthenticationDetailsSource().buildDetails(httpServletRequest));
                    SecurityContextHolder.getContext().setAuthentication(authenticationToken);
                }
            }

        }
        filterChain.doFilter(httpServletRequest,httpServletResponse);



    }
}
